Spring weather

Calculations are based on the last 8 years of historical weather data.

Temperatures

Maximum Temperatures

Period	Houston	Philadelphia
Mar 1	22.4°C	9.0°C
Mar 8	23.0°C	10.7°C
Mar 15	22.9°C	11.7°C
Mar 22	25.5°C	13.2°C
Apr 1	25.1°C	14.6°C
Apr 8	25.7°C	18.6°C
Apr 15	25.9°C	16.9°C
Apr 22	27.3°C	18.4°C
May 1	29.4°C	20.0°C
May 8	29.9°C	18.9°C
May 15	31.2°C	23.9°C
May 22	30.9°C	24.9°C
Average	26.6°C	16.7°C

Minimum Temperatures

Period	Houston	Philadelphia
Mar 1	13.4°C	1.2°C
Mar 8	14.5°C	2.0°C
Mar 15	14.3°C	3.0°C
Mar 22	16.9°C	4.5°C
Apr 1	16.2°C	6.0°C
Apr 8	17.0°C	8.8°C
Apr 15	17.5°C	8.3°C
Apr 22	18.3°C	9.3°C
May 1	20.5°C	11.4°C
May 8	21.2°C	10.2°C
May 15	22.5°C	13.9°C
May 22	22.9°C	15.7°C
Average	17.9°C	7.9°C

Maximum/minimum temperature averages are computed by averaging the max/min temperature of each day for a given period.

Conditions

Sunny Weather

Period	Houston	Philadelphia
Mar 1	4.4 hours/day	4.1 hours/day
Mar 8	2.8 hours/day	5.1 hours/day
Mar 15	5.3 hours/day	5.3 hours/day
Mar 22	5.0 hours/day	4.3 hours/day
Apr 1	4.4 hours/day	3.2 hours/day
Apr 8	4.9 hours/day	4.6 hours/day
Apr 15	4.8 hours/day	3.9 hours/day
Apr 22	5.3 hours/day	4.7 hours/day
May 1	6.6 hours/day	3.8 hours/day
May 8	6.3 hours/day	5.5 hours/day
May 15	5.9 hours/day	7.5 hours/day
May 22	5.0 hours/day	6.2 hours/day
Average	5.1 hours/day	4.9 hours/day

Sun hours are computed from the number of hours of direct sunlight. The length of the day can affect these measurements; for example, northern cities have longer days in summer.

Precipitation Levels

Period	Houston	Philadelphia
Mar 1	2.4mm	4.7mm
Mar 8	1.9mm	3.6mm
Mar 15	3.1mm	3.6mm
Mar 22	3.1mm	4.7mm
Apr 1	4.5mm	5.3mm
Apr 8	4.0mm	2.9mm
Apr 15	3.5mm	2.9mm
Apr 22	3.2mm	4.9mm
May 1	4.1mm	4.2mm
May 8	6.2mm	3.3mm
May 15	8.5mm	2.4mm
May 22	4.5mm	3.8mm
Average	4.1mm	3.9mm

Average amount of precipitation that falls in a form of a rain, snow, sleet or hail.

Wind Speed

Period	Houston	Philadelphia
Mar 1	19.3km/h	21.6km/h
Mar 8	20.1km/h	20.7km/h
Mar 15	20.0km/h	19.7km/h
Mar 22	21.0km/h	19.6km/h
Apr 1	20.7km/h	20.3km/h
Apr 8	21.9km/h	19.8km/h
Apr 15	20.6km/h	20.0km/h
Apr 22	21.2km/h	19.0km/h
May 1	20.5km/h	17.6km/h
May 8	20.2km/h	17.3km/h
May 15	20.1km/h	17.1km/h
May 22	18.6km/h	16.1km/h
Average	20.3km/h	19.1km/h

Humidity

Period	Houston	Philadelphia
Mar 1	68.8%	64.0%
Mar 8	73.1%	62.9%
Mar 15	65.4%	61.4%
Mar 22	70.9%	64.0%
Apr 1	70.4%	63.9%
Apr 8	69.9%	60.6%
Apr 15	68.8%	60.9%
Apr 22	68.6%	62.6%
May 1	70.1%	67.3%
May 8	70.2%	64.9%
May 15	70.6%	65.0%
May 22	70.3%	67.1%
Average	69.8%	63.7%

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Astronomy

Sunrise Time

Period	Houston	Philadelphia
Mar 1	6:44	6:29
Mar 8	7:01	6:44
Mar 15	7:28	7:07
Mar 22	7:17	6:53
Apr 1	7:07	6:40
Apr 8	6:59	6:28
Apr 15	6:52	6:18
Apr 22	6:43	6:07
May 1	6:36	5:57
May 8	6:31	5:50
May 15	6:26	5:43
May 22	6:23	5:37
Average	6:48	6:18

Sunrise times are output in the local timezone of each place.

Sunset Time

Period	Houston	Philadelphia
Mar 1	18:23	17:56
Mar 8	18:53	18:29
Mar 15	19:32	19:11
Mar 22	19:37	19:20
Apr 1	19:42	19:28
Apr 8	19:46	19:35
Apr 15	19:51	19:43
Apr 22	19:56	19:50
May 1	20:01	19:59
May 8	20:05	20:05
May 15	20:10	20:12
May 22	20:14	20:19
Average	19:42	19:30

Sunset times are output in the local timezone of each place.

Useful Day Length

Period	Houston	Philadelphia
Mar 1	11:23 hours	10:56 hours
Mar 8	11:52 hours	11:29 hours
Mar 15	12:04 hours	12:04 hours
Mar 22	12:20 hours	12:20 hours
Apr 1	12:35 hours	12:28 hours
Apr 8	12:46 hours	12:35 hours
Apr 15	12:51 hours	12:43 hours
Apr 22	12:56 hours	12:50 hours
May 1	13:01 hours	12:59 hours
May 8	13:05 hours	13:05 hours
May 15	13:10 hours	13:12 hours
May 22	13:14 hours	13:19 hours
Average	12:36 hours	12:30 hours

Discards daylight hours before 7 AM. In places that are located to the west of the timezone, the sun rises and sets later compared to the cities that are located to the east. This means that the useful day length is longer in the cities located to the west of the time zone.

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Spring weather

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